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Motion beginner - wanting to start with traction loss

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Dan Aitcheson, Aug 29, 2018.

  1. Dan Aitcheson

    Dan Aitcheson Member

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    Hi all,
    Long time lurker and been dreaming of motion for some time. I have decided to start small with traction loss only at this stage.
    I have a dedicated room for my rig, which is 80/20 with an Accuforce and Simvibe. I can’t justify $2500 to add traction loss via SimX so looking at DIY.

    I plan on creating a model with an RC servo and Arduino which I have laying around. So no doubt I will be back for help on that when I get it set up.
    But looking at the options for controls etc, I would like some advice.

    I have an Arduino UNO R3, so should I use Sabertooth or JRK?
    Was looking at one of these motors
    https://www.bgts.co.nz/12V-24V-DC Motors-DC Forward reverse controllers/styled-10/index.html
    which is what Rich (Avenga76) used on his.
    Eventually, I may add seat mover, but that is low on the list. I pretty much only run iRacing road racing in VR fwiw. I am not seeking massive movement, maybe 100mm each way? Should be enough to let me know I’m going over the limit.

    Any help much appreciated
    Dan
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  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
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  3. Nick Moxley

    Nick Moxley Well-Known Member

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    My Motion Simulator:
    2DOF, 3DOF, DC motor, JRK
    Correct, I did 100mm each way. Ample but if you have room, I say go a bit more.

    If your only doing 1x axis, i would almost favor a Gen 2 JRK, tho Thinking about it. ive never had a Lick of issues with my 12v12 on Traction loss...But to be safe i would still likely say go G2 for the minimal $$ increase.

    PS the upgrade beefy motor's (What Richard runs) aren't needed for TL.
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  4. Dan Aitcheson

    Dan Aitcheson Member

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    Thanks for the replies. I was thinking of the smaller 4300rpm motors with a 25:1 gearbox for swift action and it will have lesser weight to move.
    So JRKv2 with the above motor setup, and 150mm swing each way would be an ideal noob setup?
    Cheers for the replies
    Dan
  5. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
    AC motor, Motion platform
    Ever thought of fitting a servo driven harness?
    For a non-motion sim, a servo controlled harness system is a great addition, with excellent feedback if your serious about driving. A few different examples to be seen already on this site.
  6. Nick Moxley

    Nick Moxley Well-Known Member

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    My Motion Simulator:
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    Ah ok, yes 25:1 is also what i have on my TL. Tho if i recall im on 100mm lever, i dont think the 25's have enough torque to deal with any longer. Your dealing with A Lot Of inertia with the frame at full speed and the motor having to stop all that weight.



    @SeatTime Which would you suggest as a planning/starting point for someone looking into a set of belts...If i recall you documented your's...but not in full details for obvious commercial reasons ( more than understandable) Thanks bud. :)
  7. Dan Aitcheson

    Dan Aitcheson Member

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    I had thought of that after TL as a type of G seat option, so I’ll look into that soon.

    @nickmoxley Would a 50:1 box be better then? My initial thoughts were to run the motor under my seat near the front edge so it would be closer to the pivot and would be able to use a shorter lever. However I’m yet to do the maths on it all as I am also in the middle of a house renovation to keep the better half happy too.
  8. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
    AC motor, Motion platform
    Planning/Starting point would depend on if your seat moves, available space and/or if it can take the weight of the servos etc. Could be a very simple design for a non moving sim, with it getting more complex if you want to keep your seat(moving parts)light - similar to my commercial version.
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